Go for it...
Jane Auburn said:
How about built-in anti-dust system and a hybrid unit that does both sports and high-res, has a smaller battery (for smaller form factor), offers significantly greater dynamic range, and has pocket wizard capability built in?
Well Jane, if a new model comes out really offering those things... and if it's what you feel, then go for it.
But I have no problem cleaning my sensor every so often, and I personally think the vibration thing is a gimmick. It has already been written that with the mechanism there to vibrate the sensor, one can no longer get to the sensor with a swab to clean it manually. So if the vibration thing proves less than adequate, you are stuck.
The present size and weight of the MkIIN that I use is no problem for me, so battery size is not a factor. When I purchased my present body, I joked with some of my friends that I had not been getting enough exercise lately, so I my solution to building some additional upper body strength was purchasing a heavier camera.
As for improved dynamic range... everyone wants that, but let's wait and see if and when it really happens, and to what degree. I want speed, and 8fps at 8.2mg is plenty for me. Having both may be nice, but I can't say I really want a whole lot more pixels.
If a camera comes out that really has dramatic improvements on all fronts, I would still skip it and then consider the next one instead, in a couple years. Bigger and faster glass is still more important to me personally, than marginal improvements in a camera body.
That's my take, but I'm sure many will have different opinions.